When I was learning #python, I was told to keep my lines less than 80 characters. Now, when looking at other people's code, it is obvious that most people don't follow that rule. What is the status now?
PEP-8 still says 79 chars IIRC, but at this point that's honoured more in the breach than the observance.
With modern screens and editors, >80 isn't really a problem for most. Black defaults to 88; I happen to like 96. A company I work for has standardized on 120, which IMHO is too wide.
Pick something you like, configure black/your editor/etc to observe it, and be consistent, and you'll be fine.